lampebt



H. H. LA MPERT.

COLUMN CLAMP.

APPLICATION FILED DEC-6.1916;

LSWMM. LPatentedJuly 1, 1919..

HIElNRYH. LAMPERT, OF CHIGAGO,ILLINOIS.

COLUMN-CLAMP.

Specification of Letters Patent.

Patented July 1 1919.

Application filed December 6, 1916. Serial No. 135,313.

T all {whom it may concern Be it known that I, HENRY H. LAMBERT, acitizen of the United States of America,and a resident of Chicago, county of Cook, and State of Illinois, have invented certain new and useful Improvements in Column- Clamps, of which the following is aspeci- The main objects ofthis invention are to provide an improved clamping device particularly adapted for securing together the parts of a mold used'fo'r incasing beams, columns, etc., in concrete; to provide improved tightening means for drawing up the clamping members soas to force the mold parts together; and to provide imfurther slack, or for the purpose of proved means for looking the tightening means and the clamping members together either for, the purpose of allowing said tightening means to be reset so as to take up pre- ' venting any slackening of the mold during clamping the pouring or setting of the concrete.

An illustrative embodiment of this invention is shown in the accompanyingdraw-' ings, in whichv Figure 1 is a plan-of the improved form of clamp as applied to a rectangular column mold or form, which is shown 1n section.

Fig. 2 is anenlarged detail in perspective of one of the tightening means by which the -members are drawn up and locked.

In the construction shown in the draw ings, the clamp is applied'to a rectangular shaped form or mold 1 and comprises clamping means, including members 2, 3, 4 and 5, arranged to embrace the mold and be drawn ,up relatively of each other by tightenino means, in the formof wedges 8 and 13, for forcing and holding the mold parts together. The clamping members 2 and 3 are in the form of single bars or slats, whereas the members 4 and 5 comprise two bars or slats arranged in spaced superimposed relation. One end of each of the members 2 and 3 is pivoted to one end of the correspondin members 4 and 5 by means of bolts ,6 and 1 respectively. ."Thus the members 2 and 4 "constitute one section'of the clamp, and the t members and 5 constitute the other section.

When put in use, the clamp sections are placed around the mold so that thefree ends of the members intersect each other with the single bars interposed between the double bars. Rows of apertures 19 are formed in the intersecting ends of the members 2, 3, 4 and 5 and extend longitudinally of the re-. spective members. i

The wedges S embrace the intersecting ends of the clamping members, being provided with slots 9 for receiving the double bar members 4 and 5 and slots 9.1 for re ceiving the single bar members 2 and 3.

The inner wedging faces 20 ofthe wedges 8 therefore bear against the edges of the double bar men'ibers 4 and 5, and the-other or outer wedging faces 21 bear against suitable pins 11 inserted in apertures 19 in the sin le bar members 2 and 3.

The wedges 13 are arranged to be inserted between the two bars of the members 4 and 5 so that the inner wedging faces 22 bear upon the heads 14 of the respective wedges 8 and the other or outer wedgingfaces 23 bear against pins 15 adapted to be inserted in apertures 19 formed in the members 4 and 5.

The locking of. the clamping members after they have once been fully drawn up,

is provided for by slots or apertures 10 and 18 formedin the wedges 8 so as to register.

with the rows of apertures 19 in the respective members 2+8 and 45, into which suitable pins may be inserted. The locking means also serve to temporarily-lock the clamping members so as .to permit the wedges 8 and 13 to be readjusted to take up further slack in the respective members. To this end, the slots 10 are elongated longitudinally of the wedges 8 so as to extend substantially parallel to the members 4 and 5. Thus, a pin 12 inserted into the slot 10 and one of the registering apertures 19 in one of the members 2 or 3, permits the wedge 8 to be shifted back on the respective member to allow the pin 11 to be advanced into one of the apertures closer to the member 4 or 5. Likewise, a pin inserted into the slot or aperture 18 and a registering aperture 19 in the member 4 or 5, allows one of the wedges 13 to be retracted andthe pin 15 advanced into another aperture closer to the member 2 or 3. g

The wedges 13 are provided with pins or shoulders 16 and 17 located at opposite ends th reof, which prevent the withdrawal of .the wedges from between the bars of the The sectioi placedaround;the form or mold ivitli' t'h'e free ends intersecting and extending through the respective slots in the wedges 8, as has been explained, and .the parts drawn up by hand as tight as possible. 'ith the wedges R in their retracted positions, the pins 11 are inserted into apertures in the. members and 3 so as to abut against the wedging faces 21 of the wedges S. The heads 11 of the wedges S are then tapped by a hammer, or other suitable implement,thereby drawing up the members 2 and 3 relative to the members .i and 5; If, after having forced the wedges 8 in the full limit of their travel, it is found necessary to take up further slack in the clamp, pins 12 are inserted in the slots 10 and re isterin a )(IttliGS 1.9

in the members 2 and 3, which secure said members in the place but allow the wedges 8 to be readjusted so that the pins 11 may be set up another aperture closer to the mem bers t and 5. The pins 12 are then removed and the driving of the wedges repeated.

This operation is Continued until the members 2 and 3 are drawn as tightly as possible, whereupon the wedges 13 are drawn back as far as )crmitted bv contact of the pins 14 with the respective members 4 and 5.

The pins or stops 15 are then inserted through the apertures 19 in the superposed members 1 and 5 so as to bear against the wedging faces 23.

The wedges 13 are then driven inward so as to draw the members 1 and 5 relative to the members 2 and 3.

If, after the wedges 13 have been driven the .limit of their movement, it is necessary,

to take up further slack, pins are inserted into the apertures 18 or wedges 8 and registering apertures in the members 1 and The wed 'es 13 may then be retracted and the ,V a pins 10 reset 1n apertures closerto the members 2 and 3. The drivin of the wed es may then be continued until the members 4:

and 5'are drawn up tightly.

It will be observed that the second wedges 13 hear at all times upon the heads 14- of the i the clamp.

Vhen it is desired to lock the clamp after having been drawn up as tightly as possible, pins are inserted into the slots 10 and 18 in tliewedges 8 and registering apertures in the respective members 23 and 4-5, which positively secures the members to the wedges S and prevents slackening during the pouring or settingof the concrete.

wedging faces of the wedges.

, claims.

I claim: 1

1. A clamp comprising two members arranged in crossed'relation and each slidable lengthwise on the other, a wedge having its inner wedging facelbearing against one'of said members and slidable longitndinall v thereon with its head substantially parallel with the other member. a second wedge having its inner wedging face bearing against the head of said first wedge and slidable longitudinally thereon, and stops on said members bearing respectively upon the outer 2. A clamp comprising two mcn'ibers arranged in crossed relation, a stop on each of said members, a wedge having its wedgingfaces bearing between one'of said members and the stop on the other of said members, and a second wedge having its wedging faces bearing between said first-mentioned wedge and said other stop, whereby the slack in both said members may be simultaneously taken up by driving said second wedge.

3. A clamp comprising two men'ibers arranged in crossed relation, a stop on each of said members, a wedge having its wedging faces bearing between one of said members and the stop on the other ofsaid members, a second wedge having its wedging faces bearing between said first-mentioned wedge and said other stop, whereby the slack in both said members may be sinuiltaneously taken up by driving said second wedge, and apertures in said first -mentioned wedge adapted to register substantially simultaneously with apertures in both said members to receive locking pins.

4. A clamp comprising two members arranged in crossed relation, a wedge having one of its wedging faces beariiig against one of said members, a stop on the other of said members against which the other wedging face of said wedge bears, coacting means on said members and said first mentioned wedge adapted to be used for locking said second member to said first mentioned wedge and at the same time permitting the longitudinal movement of said wedge on said first mentioned member.

5. A clamp comprising two members arranged in crossed relation, a wedge having one of its Wedging faces bearing against one of said members, a stop ontthe other of said members against which the other wcdging face of said wedge bears, said other member having a row of apertures therein, said wedge having a longitudinally disposed slot formed therein'and extending substantially said members, a wedge having its wedging' parallel to said I one member, means adapted to be inserted into said slot and one of said apertures to secure said othermefnber to sald wedge m a manner permlttlng said Wedge to be readjusted relative to said one member for. further operation;

6. Aclamp comprising two members arfranged in crossed relation, a stop on each of faces bearing between oneof said members and the stop on the other of said members,a"

- wedge, each ofsaid members having arowof aperturesformedtherein, sa1dfirst-men- ,1 7.'A clamp comprising a plurality of members, two of" which 'are arranged in crossed re1ation, each' of said members havr i'ng a row of, apertures extending longitudiother wedging face'of said wedge, whereby tion'ed wedge having apertures formed therein adapted to register respectively with the rows of apertures in said members, and lockingmeans adaptedtobe inserted into -the:registering apertures on said wedge and respective members for locking. said members to'sald' wedge.

nally thereof, a wedge embracing each of said members adJacent vt0 the intersection wedging faces bear against one of said members, its head being substantially paral lel with the other memberya pin adapted to be inserted in 0ne\of sa d apertures n the other said memberso as to bear'against the thereof and arranged to haveone of its saidwedge may be actuated rto drawsaid other member relative to's'aid one member, a' second Wedgevhaving one of its wedging faces bearing uponqthe head ofjsaid firstmentionedwedge, and'a pin adapted to be inserted in one of theapertures in said one 7 member whereby said second wedge may be actuated to simultaneouslydraW both of said,

members relative 'to each other.

A clamp comprising a plurality of. members, two of whlc'ltlare arranged in crossed relation, each off said members have ing a row of apertures-extending" lo' tudin'ally thereof, a' wedge embracingiae of said members adjacentto-the lntersectlo I wedging faces bear against one of said'memsaid apertures in the other said-member so as to bear against'the other wedging ifaceof said-wedge, whereby said Wedge may e at:- tuat'edto draw said other member relative .to send one member, sald wedgehaving-a longitudinally disposed slot formed therein and extending substantlally parallel to said one member so as to register with the aper:

'tures in'said other member, and a pin adapted; to be inserted into said slot andairegistermg aperture in sald other member so that j usted longitudinally of said one member tp permit the pin coacting with said other Wedgmg faces to be] advanced bers a pin adapted: to be inserted in, one of said other member is secured to said wedge v 1111a, manner permitting sald wedge to be adthereof and arranged to have. one of its into clpser 

